Level 15: Obstacle Course - Waterdeep: Dungeon of the Mad Mage

Level 15: Obstacle Course. The Obstacle Course is designed for four 13th-level characters, and adventurers who defeat the monsters on this level should gain enough XP to advance to 14th level. Before running this level of Undermountain, review the description of the death tyrant in the "Beholders" entry in the Monster Manual, as that information will help you roleplay the death tyrant that claims the Obstacle Course as its lair. What Dwells Here? Visitors to this level must contend with mechanical traps left behind by the Melairkyn dwarves, magical traps crafted by the Mad Mage, and an undead beholder named Netherskull. They might also encounter nuisances from the Elemental Planes of Earth and Fire, and a band of githzerai on a special mission. Netherskull the Death Tyrant Many years ago, a beholder floated up from the Underdark and infiltrated Undermountain. After carving out a lair for itself, the beholder dreamed itself into undeath, becoming a death tyrant called Netherskull. When Halaster and Netherskull met in battle, the wizard emerged triumphant, but he couldn't bring himself to destroy such a formidable dungeon guardian. Instead, Halaster agreed to let Netherskull remain the undisputed lord of this level on the condition that it permit Halaster to tinker with and maintain the level's traps, as well as add a magical, mean-spirited announcer that taunts visitors as they blunder from one room to another (see "Halaster's Play-by-Play"). Githzerai Zerths Four githzerai zerths have taken refuge in the Obstacle Course. They use their psychic abilities and natural stealth to hide from Halaster's magical gaze and the death tyrant's watchful eyes. The githzerai are aware that githyanki have conquered the Crystal Labyrinth (level 16) and are waging war against a mind flayer colony in Seadeeps (level 17). The githzerai wait patiently to see the outcome of the Seadeeps conflict but stand ready to assist should the githyanki need help. The leader of this githzerai ban...